Steam-gage cock



UNWE STATES JOHN H. LUCAS, OF SALAMANCA, NEW YORK.

STEAM-GAGE COCK.

ELZIZEICATIQN forming part of Letters Patent N0. 306,937, dated October21, 1884.

Applieation filed May 5, 1884. N0 mode1.)

In aZZ w7wm zb mcty concern:

De it knox vn that I, JOHN H. LUOAS, a Citizen ofthe United States,residing at Salamanca, in the county 0f Oattarzmgus and State 0f NewYork, have invented certain new und usfn1 Improvements in SteamGage(Docks; und I do hereby dec1are that the following is a ful1, clear, undexact deseription 0f the SELUIG, referenee being had t0 the annexeddrawings, mztking 21 part 0f this specification, and to the letters andfigures 0f referenee marked there on.

Figure 1 0f the drawings is a seetional elewntion 0f a gage-coekconstructed according t0 1ny inmution, and Fig. 2 a detail view insection and on an enlarged scale.

The present invention has relation t0 certain new and usefulimprovements in gztge'-cocks 1'01' steam-boilers; and it eonsists in theseveral details 01" constructjon, substantially as shown in the drawingsand hereimpfter described und e1aimed.

In the accompanying dmwings, A represents the Shell 01 body 0f the cool;ot'the usua1 form und provided with the nozzle a and Stuffingb0x Z),through which passes thehollowstem B, serew-threaded 21t its innerenc1to engge with screw-threads on the interior 0f the Shell 01 body,said Stem having the usua1 -hand-wheel C f01 turning it held thereon byajam-nut.

The valvespindle is constructed in two see tions, D E, the outer sectionhaving itS end adapted t0 receive a suitable wrench f01 operztting it,and its opposite endhaving a feather, c, so that when the section ispushed in a, direetion toward the eeti0n E th'e projeetion will engagewith ZL correspondingly-formed notch, (Z, in the end 0f seid section,thus ena-. Ming the valve-stem t0 be turned on its ztxis.

lt Will be notieed that the valve F iS 0f bemispherieal shape, ztnd theSeat e suffieiently coucave t0 f0rm a elose und water-tight joint whenthe valve is resting thereon.

The essential features 0f my invention 1ie in the particularconstruetion 0f the 0uter end of the stem B and outer end of thevalvespind1e D.

The boxe of the stem B at its extremity is somewhat enlarged to form aspace, f, Sufficient in diameter to admit the eircumferential fiange gon the spindle-section D, as shown section being limited by the fiange gabutting against a eireumferential shouldex, h, formed.

by the spaee 01 enlargement of the bore, as hereinbefore deseribed.

A ring, a, 1's passed over the e11d of the Spindle-seetion D, and is ofsuch diameter .as t0 rest against the end of the Stern B, a. packing, k,being interposed between the ring and a stuffing-box, Z. This ring holdstl1e packing in place an d from contact With the flange 011 thespindle-seetion, thereby enabling said seetion t0 freely move back undforth as required, and at the Same ti1ne form a steam 01 water tightjoint.

The flange 011 the spindle-seetion in connectiou with the shoulder 011the stem forma together a means for lin1iting the extent 0f movement ofSaid section when coupling the tw0 seetions of the mlve-spindle.

The va1ve F is formed with an enlargemei1t, m,which abuts ztg2tinst theend 0f the stem B.

'\Vhen the spindle-seetion D is in the position as shown in Fig. 1 andthe stem screwed 0ut sufficiently, the valve F Will be free to move offof the seat e by the pressure of the steam against it; but when t11estem is screwed into the Shell A far enough to bring the valve tightlyagainst its seat, it will be permanently held there, and by foreing inthe spindle-secti0n D uutil the ieather c engages With the notch d 011the section E the spindle Will be as 0f 011e piece. By then applying asuitable wrench 01 t001 t0 tl1e outer encl of the seetion D the tw0sections eomposing the spii1dle.

can b e turned 011 its axis, anti by the bemispherieal form 01 the va1veF zmd the form of tl1e seat e the Sediment can be effeetually ground 0utwhile the boile r has 0n a full head 0f steam.

H2tvjng now fu1ly described my invention, what I claim as new, anddesire t0 seeure by Letters Patent, iS-

l. In a ga-ge-coek, the eombinatiou, with a, hollow screw-threaded Stem,0f a VEtlV8-SPilldle formed in tw0 sections adapted to be counected 01"diseonneeted from each other, pne of S2tid sections having zthemispherieal-formed va1ve, substantially as and for the purpose Setforth.-

2. In a gage-cock, 2b 110110W screw-threaded more clearly in Fig. 2, themovement of seid I stem having an enlarged bore ab its 0uter ex- IOO

